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Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC
Joint Authors
Koyama, Michihisa
Ishimoto, Takayoshi
Source
International Journal of Electrochemistry
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-30
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
We theoretically analyzed the formation energy and solvation free energy of Pt(II) and Pt(IV) complexes with three types of ligands (H2O, OH−, and CF3SO3 −) in electrolyte environment under the low- and high-humidity conditions to study the Pt electrocatalyst degradation and dissolution mechanisms for polymer electrolyte fuel cell.
To represent the low- and high-humidity conditions in perfluorosulfonic acid (PFSA) polymer electrolyte membrane, we controlled the dielectric constant based on the experimental result.
We observed general tendencies that the formation energy becomes larger while the solvation free energy becomes smaller under the low-humidity condition.
The degradation of Pt complex from Pt surface is indicated to be accelerated by the adsorption of the end group of PFSA polymer side chain, on the Pt surface by comparing the desorption energies of [Pt(H2O)2(OH)3(CF3SO3)] and [Pt(H2O)2(OH)4].
The [Pt(H2O)4]2+ is not formed by the proton addition reaction between Pt complexes under the low-humidity condition of PFSA environment.
From the analysis of possible reaction pathways of Pt complexes, we found the influence of humidity on the reactivity of Pt complex.
American Psychological Association (APA)
Ishimoto, Takayoshi& Koyama, Michihisa. 2012. Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC. International Journal of Electrochemistry،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-463102
Modern Language Association (MLA)
Ishimoto, Takayoshi& Koyama, Michihisa. Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC. International Journal of Electrochemistry No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-463102
American Medical Association (AMA)
Ishimoto, Takayoshi& Koyama, Michihisa. Theoretical Study on Solubility from Pt Electrocatalyst and Reactivity in Electrolyte Environment of Pt Complex in PEFC. International Journal of Electrochemistry. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-463102
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-463102